RULE 2

• Number the atoms in the carbon chain from the end that gives the first substituent the lowest number.

RULE 3

Name and number the substituents.

• Name the substituents as alkyl groups.
• Every carbon is part of the longest chain or a part of a substituent, not both.
• Each substituent needs its own number.
• If two or more identical substituents are bonded to the longest chain, use prefixes to indicate how many: di- for two groups, tri- for three groups, tetra- for four groups, etc.

Finally, write the name.

• Substituent names and numbers come before the parent.
• List substituents in alphabetical order, ignoring all prefixes except iso, as in isopropyl and isobutyl.
• Separate numbers by commas and separate numbers from letters by hyphens. The name of an alkane is a single word, with no spaces after hyphens and commas.

We also learned that the 2D structure of chemicals can be converted to 3D diagram using molview, a free browser app that user friendly and very easy to use. All we have to do just copy the draw the 2D structure and the app will automatically convert the structure to 3D.

_{Representing Bonds}

In 1666, English scientist Sir Isaac Newton discovered that when pure white light passes through a prism, it separates into all of the visible colors. Newton also found that each color is made up of a single wavelength and cannot be separated any further into other colors.

Color Psychology as Therapy

Several ancient cultures, including the Egyptians and Chinese, practiced chromotherapy, or the use of colors to heal. Chromotherapy is sometimes referred to as light therapy or colorology and is still used today as a holistic or alternative treatment.

In this treatment:

          Last week, we had our presentation with Dr Raihan about the gene and its effect on extracellular matrix cell. Our class been divided into 12 groups where the members of the group must have four people.The brothers group divided into two groups and for first brother group, we has been assigned with BCL2 gene. So these is the slide that we prepared for the presentation.